I'm seriously annoyed...actually I'm so fuming that I feel like telling everybody not to bother returning!!!

I'm on holiday this week (back on Tuesday) so can't talk to parents face to face. I logged onto my bank yesterday and no money in there. 1 family have fully paid their vouchers in time and half another family but I'm still waiting for another 6 payments. (vouchers wont come in to my bank until Friday but that's fine, at least they've issued them on time)

Log in this morning and still nothing. I'm so mad I've literally had to stop myself writing a blunt text with probably a few swear words inserted!!!

I'm drafting out a letter about late payments and will hand out on Tuesday (Is £5 per day fair or should I go for higher)

How should I word the text so its not too rude but they know that I'm seriously p****d off ?